HÀNH ĐỘNG ĐANG DIỄN RA CHIA QKTD, HÀNH ĐỘNG XEN VÀO CHIA QKĐ

1. rang-was watching

2. were driving-happened

3. were making-arrived

4. went-were having-came

5. were doing-was working

6. began-was sitting

7. was-left-was falling

8. saw-were trying

9. was walking-felt-didn't know

10. were driving-appeared

11. was walking

12. was attending

13. was standing

14. was studying-were having

15. were dancing

1 rang - was watching

2 were you driving - happened

3 was making - arrived

4 gone - were having - came

5 was - doing - was working

6 began - was sitting

7 was - left - was falling

8 saw - was trying

9 was walking - felt - didn't know

10 was driving - appear

11 was walking

12 was attending

13 was standing

14  was studying/was having

15  were dancing